Fun with type functions. Simon Peyton-Jones
announced
that he, Ken Shan, and Oleg have finished Version 2 of their paper
"Fun with Type Functions", which gives a programmer's tour of what type
functions are and how they are useful. If you have a moment to look at, and
wanted to help them improve it, leave comments on the linked wiki page.

TernaryTrees-0.1.1.1 - An efficient ternary tree implementation of
Sets and Maps. Alex Mason
announced
the release of TernaryTrees, a
package that extends Data.Set ad Data.Map with some ternary tree structures,
one of the more efficient ways of storing strings in a set.

6.12.1 planning. Simon Marlow
announced
plans for a release of GHC 6.12.1, sometime around September. If you
have the time and inclination to help with any of the listed features,
please get involved!